a:7:{i:0;s:2:"id";i:1;s:3:"url";i:2;s:8:"username";i:3;s:11:"access_time";i:4;s:9:"client_ip";s:3:"_pk";s:2:"id";s:5:"_type";a:5:{s:2:"id";s:6:"int(6)";s:3:"url";s:12:"varchar(100)";s:8:"username";s:8:"char(20)";s:11:"access_time";s:7:"int(10)";s:9:"client_ip";s:8:"char(15)";}}